并联混合动力系统构型筛选及参数优化设计

doi:10.19562/j.chinasae.qcgc.2024.03.010

Abstract

Abstract:

This paper focuses on the screening of parallel hybrid power system configurations employing the Ravigneaux planetary gear mechanism and traditional multi-gear transmission. A comprehensive evaluation method， integrating gear design rules， dynamic characteristics rules， working mode rules， and manufacturability rules based on the lever method， is applied to analyze and screen the hybrid power system configurations. The configuration scheme and screening process of this method are determined. Subsequently， in line with the vehicle's design objectives， parameters of the engine and motor are selected. The vehicle's longitudinal dynamics model is established using GT-SUITE software. On this basis， transmission parameters are optimized using the Pareto frontier method. Finally， upon determining the hybrid configuration， the design parameters of the hybrid power system are optimized and determined. The feasibility of the scheme is validated through simulation， providing a theoretical basis for the research of parallel hybrid power systems using the Ravigneaux planetary gear mechanism and traditional multi-gear transmission.

Key words: hybrid power configuration, screening, parameter optimization of transmission, Pareto front, simulation

Zexing Wang,Hongwen He,Jiankun Peng,Yang Zhang,Shuang Ji,Yuan Zhang. Configuration Screening and Parameter Optimization Design for Parallel Hybrid Power Systems[J].Automotive Engineering, 2024, 46(3): 464-475.

Figures/Tables 26

参数	符号	数值
车辆整备质量/kg	$m$	2 115
最大满载质量/kg	$m H$	2 540
车辆轴距/m	L	2.745
迎风面积/m²	A	2.87
风阻系数	$C D$	0.43
车轮滚动半径/m	$r$	0.377
滚动阻力系数	$f$	0.015
旋转质量换算系数	$δ$	1.2
主减速比	$i 0$	4.158
前行星齿轮机构特性参数	$α$	1.818
后行星齿轮机构特性参数	$β$	2
传动效率	$η t$	0.92
WLTC循环油耗/（L·100 km^-1）	$Q$	8.8

方案	1	2	3	4	5
$i 1$	3.150	3.168	3.113	3.068	3.053
$i 2$	2.230	2.249	2.236	2.210	2.080
$i 3$	1.579	1.596	1.605	1.592	1.543
$i 4$	1.118	1.133	1.153	1.147	1.132
$i 5$	0.791	0.804	0.828	0.826	1
$i 6$	0.560	0.571	0.594	0.595	0.608

方案	5	1	2	3	4
$Q s m i n$ /（L·100 km^-1）	8.568	8.271	8.303	8.311	8.332
$Q s m i n$ 变化率/%		3.47	3.09	3.00	2.76
$T m i n$ /s	5.824	5.774	5.761	5.782	5.809
$T m i n$ 变化率/%		0.86	1.09	0.72	0.25
$v m a x$ /（km·h^-1）	212	204	206	210	211
$v m a x$ 变化率/%		3.63	-2.74	-0.72	-0.68
最大爬坡度/%	60	60	60	60	60

References 9

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序号	评价项目	规则及指标
1	挡位设计	（1）系统中行星齿轮机构与变速器配合产生较多的挡位数量；（2）系统中产生的挡位级差应该均匀且不能过大。
2	传动特性	根据动力系统设计的要求，行星齿轮机构应实现减速增转矩效果。
3	工作模式	（1）应能实现纯电驱动、发动机直驱、混合动力驱动、行车充电、怠速充电、纯电（混动）制动能量回收等混合动力工作模式；（2）具备发动机独立完成车辆起步的工作模式和能力。
4	可制造性	混合动力系统的动力输入和输出连接方案，应该满足结构上的可设计、可制造性。

模式	挡位	制动器 B1	离合器 C1	双输入轴变速器
模式	挡位	制动器 B1	离合器 C1	1挡	2挡	3挡	4挡	5挡	6挡
纯电动模式	1	●		●
	2	●				●
	3	●						●
混合动力模式	0/1			●
	1		●	●
	1/2			●	●
	2		●		●
	2/3				●	●
	3		●			●
	3/4					●	●
	4		●				●
	4/5						●	●
	5		●					●
	5/6							●	●
	6		●						●

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Configuration Screening and Parameter Optimization Design for Parallel Hybrid Power Systems

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Figures/Tables 26

References 9

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参数	数值
遗传代数	100
优化变量	2
交叉概率/%	100
变异概率/%	50